Keir Starmer’s leadership faces mounting pressure following the resignation of his chief of staff, Morgan McSweeney, amid fallout from the Peter Mandelson scandal.
Morgan McSweeney’s Resignation
Morgan McSweeney, Downing Street chief of staff, stepped down after advising the Prime Minister to appoint Peter Mandelson as US ambassador. Mandelson was dismissed last week over his past association with Jeffrey Epstein, the financier convicted of child-sex offenses.
McSweeney stated: “After careful reflection, I have decided to resign from the Government. The decision to appoint Peter Mandelson was wrong. He has damaged our party, our country and trust in politics itself.”
He added: “When asked, I advised the Prime Minister to make that appointment and I take full responsibility for that advice. In public life responsibility must be owned when it matters most, not just when it is most convenient.”
McSweeney called for a complete overhaul of the vetting process for appointments and emphasized support for the victims of Epstein. His deputies, Jill Cuthbertson and Vidhya Alakeson, now serve as acting joint chiefs of staff.
Labour MPs Question Starmer’s Position
Several Labour MPs describe Starmer’s position as untenable. Former campaigns chief Jon Trickett warned: “The buck stops at the top.”
Brian Leishman, MP for Alloa and Grangemouth, urged: “There must be a change in political direction and that comes from the very top. So the Prime Minister must look at his own position and question whether he should follow McSweeney’s lead one last time, and resign for the good of the country and the Labour Party.”
Liverpool MP Kim Johnson called the Prime Minister’s position “untenable,” while York MP Rachael Maskell viewed McSweeney’s exit as “a start.”
Conservative Criticism
Tory leader Kemi Badenoch criticized Starmer on X, stating: “Once again with this PM it’s somebody else’s fault: ‘Mandelson lied to me’ or ‘Morgan advised me’. Keir Starmer has to take responsibility for his own terrible decisions. But he never does.”
Starmer’s Response and Leadership Speculation
Starmer prepares an emergency address to outline plans to restore trust in politics. He plans to speak to the Parliamentary Labour Party today, insisting the government’s policy agenda remains unchanged.
Potential rivals, including Deputy Prime Minister Angela Rayner, Health Secretary Wes Streeting, David Lammy, and Energy Secretary Ed Miliband, position themselves amid speculation of a leadership contest.
Work and Pensions Secretary Pat McFadden warned that ousting Starmer could cause “chaos and uncertainty – economically, politically and reputationally around the world.”
Paths to Potential Ouster
Labour rules require 80 MPs to nominate a challenger for a leadership contest. Starmer could resign voluntarily, face a delegation of senior MPs, endure a vote of confidence, or weather ministerial resignations.
This marks the second chief of staff departure under Starmer, following Sue Gray’s sacking post-2024 election. Recent US Department of Justice emails highlight Mandelson’s alleged leaks to Epstein, intensifying calls for accountability.

